Removal of Gaussian and Impulse Noise in the Colour Image Progression with Fuzzy Filters

This paper is concerned with algebraic features based filtering technique, named as the adaptive statistical quality based filtering technique (ASQFT), is presented for removal of Impulse and Gaussian noise in corrupted colour images. A combination of these two filters also helps in eliminating a mixture of these two noises. One strong filtering step that should remove all noise at once would inevitably also remove a considerable amount of detail. Therefore, the noise is filtered step by step. In each step, noisy pixels are detected by the help of fuzzy rules, which are very useful for the processing of human knowledge where linguistic variables are used. The proposed filter is able to efficiently suppress both Gaussian noise and impulse noise, as well as mixed Gaussian impulse noise. The experiments shows that proposed method outperforms novel modern filters both visually and in terms of objective quality measures such as the mean absolute error (MAE), the peaksignal-to-noise ratio (PSNR) and the normalized color difference (NCD). The expectations filter achieves a promising performance. KeywordsGaussian noise, Impulse noise, Adaptive distance, fuzzy logic, image denoising, logic, nonlinear filters.